Stem for electric-lighting fixtures



E. ROCKOFF.

STEM FOR ELECTRIC LIGHTING FIXTURES.

APPLICATION FILED JULY 6.1920.

1&2 3,683; Patented July 25, 1922.

'ELIAS nooxorr, or cIIIcAeo, ILLINOIS, AssIGnon or ONE-HALF rosnnnann I no'oxorr, or CHICAGO, ILLINOIS.

STEM FOR ELECT IC-LIGHTING FIXTURES.

' "Application filed July 6;

To all wlzomt'may concern:

Be it knownthat I, ELIA-s RooKoFF, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have 'in'vented a certain new and useful Improvementin Stems for Electric- Ligl iting Fixturestof which the following is a full, clear; concise, and exactdescription,

reference being had to the accompanying drawings, forming' a part of this specification.

This invention relates to lighting fixtures, and has reference more particularly to pendant steinsor-"wall brackets therefor. The invention has among its various objectsthe production of a stem which i's-"simple in cons truction cheap to manufacture,"and which may be" either stamped intoform or cast of metal or other sui table 'materiahand provided with the' -desired-structure tofacilitate thepassage' and retention of theconductors in their proper position relative to thestem and also to provide a meanswherebyvarious fixtures, such as globes," lights, etc., -may be suspended therefrom or supported thereby.

The invention contemplates a structure which: provides a separate groove orpa's'sage for each conductorthereby separatiIIg them, which permits eaclr conductor to be inserted and passed along without interference.

The invention also contemplates anarrangement whereby the conductors may be enclosed or encased'so as'to'confor'm with the fire ordinance or requirements of various cities and to present amore pleasing appeara nce" when the stem is exposed to viewy it being ordinarily hidden by a canopy which surrounds it. The invention has theseand other objects, all of which will be more readily understood when read in conjunction with the accompanying drawing in which- Fig. 1 is'a sectional view of-a stem ap plied in position.

F ig; 2 is a perspective View thereof.

Fig.3 is a section takenon line 3 -3 of Fig. 1.

Figsi'a, 5 and r 6 illustrate modified structures which may be utilized at the lowermost end of the stem.

In the exemplifi'cation of the invention illustrated in the drawings the stem 10 is provided with a-threaded extension 11 whereby" it maybe attached to the member 12 whichis in turn connected tetheextension 13 usually provided in buildings for the Specification of Letters Patent. '1 Patented July 25, 1922.

192'0'. Ser'iat 1%. 394,206.

purpose of"-affording a support to which lighti'ngfixtures be attached.

The opposite end of the stem is in this instance provided with an integral ring" 14 to which is attached the usual globe'orbowl supports of'the lighting fixture. This ring may be supplied with an arrangement whereby various attachments may be connected thereto, such as sockets, etc, and will be explained in detail in the following.

-. The invention has as an object the provision of an arrangement whereby each 0011- ductor may be readily inserted into, passed along and confined in a separate groove prov'ided in the stem. This arrangement facilitates the passage of the conductors along the stemas the individual conductors'are sepa rated from each other by a'wall which prevents their being brought into'contacowitli each other. By separating the conductors and providing a'separate groove orrecess for each conductor instead of arranging two conductors in a single tube or passage, the conductors may be drawn through or passed along the recess with comparative ease as the usual friction between them and the stem is practically entirely eliminated.

These grooves are designated by the numerals 14 and 15. are separated by the-wall 10 and extend along the stem from adjacent the uppermost end to near the opposite end where they terminatein a connection with a tubular opening 16 which is in alignment with its respective groove 14* and 15. The uppermost'end of each of these grooves is provided with a curved wall 17 which assists in guiding the conductor into and along the groove and through the opening 16.

The uppermost end of the stem is further provided with a transverse'strap 18 which extends across the groove this strap is provided to properly hold the conductors within the groove when a pulling strain is exerted thereon.

Provision for enclosing the conductors in the grooves is also made, the arrangement of this structure being such that it can be readily attached or removed as required. This structure includes a pair of plates-19, one for each groove, which is removablfyattache'd to the stem and extends from that end having the tubular apertures 16'to adjacent the straps 18. One 1 edge of these plates is bent to produce the rib or flange 20 which is arranged in a groove 21 provided in the stem, the opposite edge of the plate is provided with an aperture through which the screw 22 is passed and then threaded into the threaded opening .23 provided in the stem. v

The ring 14 may be constructed so as to accommodate or have attached thereto various elements, such as a lamp socket or other device, and to permit the conductors which extend from the stem to be passed therethrough to the element or device attachedto the ring. In the structure illustrated in Fig. 4: the ring is provided with an internally threaded boss 24 into which may be threaded the threaded extension of a lamp socket or shell or any other device. 7

The structure shown in Fig. 5 shows a ring provided with an externally threaded portion upon which may be threaded an internally threaded portion.

Whereas these extensions are shown as extending from the lowermost portion of the ring, they may as shown in Fig. 6 be ar? ranged so as to position the device sought to be attached so that it extends laterally with respect to the stem. 1

From the foregoing description it is obvious that a simple and cheap structure is provided whereby the conductors may be readily threaded or passed along and prop erly retained in the grooves. It is also evident that by virtue of the straps 18 the conductors will be maintained in their proper position so as not to interfere with the application of the plates 19 or the adjust ment. of the canopy along the stem.

,VVhat I claim and desire to cover ters Patent isa 1. rt lighting fixture stem, one end of which is provided with means for securing said stein in position, the opposite end having a pair of apertures which areseparated by a wall which extends from said end to adjacent the opposite end of the stem, grooves arranged upon the oppositesides of the wall which separates said apertures, the opposite sides of said wall providing one face of each of said grooves, a supporting member projecting from the opposite end of said stem whereby another supporting member may be secured to the stem, said last mentioned supporting member being arranged in substantial alignment with said wall between the apertures provided at the lowermost end of the stem.

2. A. lighting fixture stem, one end of which is provided with means for securing said stem in position, the opposite end having a pair of apertures which areseparated by a wall which extends from said end to adjacent the opposite end of the stem, gl'OOVBS arranged upon the opposite sides of the wall, the opposite sides of said. wall by Letproviding one face of each of said grooves, a strap arranged at the uppermost end of and extending acrosseach groove, a sup porting member projecting from the opposite en of said stem whereby another member may be secured to the stem, said last mentioned supporting member being arranged in substantial alignment with 'said wall betweenthe apertures provided atthe lowermost end of the stem.

3. A device of the, class described, comprising a stem, means provided at one end thereof whereby the same may be attached to a support and having meansjprovided at the opposite end whereby an element may be supported, said stem having a plurality of conductor receiving recesses and means for independently closing and exposlng each recess, said means and stem having co-operating portions to hold said means with relation to the stem and said means being re movable laterally with respect to the sides of the stem to expose said recesses. a

4. A deviceof the class described,comprising a stem, means provided at one end thereof whereby the same may be attached to a'support, a plurality of recesses provided in said stem,the uppermost end of said recesses being provided with means to assist in inserting a conductor therein, means provided at said end for retaining said con ductor in the recess, the opposite end of the recess being closed bya wall having an aperture which is in substantial ealinement with the recess and independently removable means for] closing" each recess, said means being removable laterally with re spect to the sides of the stem to expose the recess, and means provided at the lowermost end of'the stem. for supporting another element thereby said last mentioned means being arranged transversely to theiapev tures provided in the wall. 1 I

5. A device of the classdescribed, com prising a stem, a threaded extension pro vided at one end whereby it may be attached to a support, saidfistemhavinga pair of separatedgrooves which extend'substantially throughout the length of the stem for the reception of individual conductors, an aperture arranged attthe opposite endl'of the stemat the lowermost termination of each groove, a closure for said grooves and a supporting member-extending from the lowermost end of theistem,said supporting member having threaded means whereby an other member maybe attached thereto.

6. A device of the, class described, com: prising a stem, said stem havingparallelly arranged grooves for receiving conductors, the opposite end ofgthegrooves having pore tions which extend transversely across each groove, one end of the stem having means whereby it may be attached to a support, and the opposite end having means am ranged transversely to the grooves whereby another member may be supported thereby may be attached to a support and having means provided at its opposite end and arranged transversely to the grooves whereby a member may be supported thereby said last mentioned means having a threaded aperture to permit the conductors to be passed therethrough and to permit another element to be secured to said stem.

In Witness whereof, I hereunto subscribe 20 mv name this 80th day of June A. D, 1920.

ELIAS ROCKOFF. 

